258565720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{923449}}^1$

素因数の和:923467

約数の個数: 32

約数和(自身を含む): 664884000

約数和(自身を除く): 406318280

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 923449, 1846898, 3693796, 4617245, 6464143, 7387592, 9234490, 12928286, 18468980, 25856572, 32320715, 36937960, 51713144, 64641430, 129282860, 258565720]

約数ペア:

[(1, 258565720), (2, 129282860), (4, 64641430), (5, 51713144), (7, 36937960), (8, 32320715), (10, 25856572), (14, 18468980), (20, 12928286), (28, 9234490), (35, 7387592), (40, 6464143), (56, 4617245), (70, 3693796), (140, 1846898), (280, 923449)]